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1. Stereo Parabolic Dish with Side Capsules (was Split Parabola Boundar

Subject: 1. Stereo Parabolic Dish with Side Capsules (was Split Parabola Boundar
From: "Rob Danielson" danielson_audio
Date: Mon Jan 28, 2008 7:26 am ((PST))
At 12:00 AM +0000 1/28/08, tk7859 wrote:

>Finally the geese arrive home at 4:38 pm - 8 minutes late!

I explored the frequency response of this recording a bit. There 
seems to be some resonance just above 300 Hz that is consistent with 
that I came across in the inside localization test. There is nothing 
else obvious that stands out and would require comparison to 
recordings made with capsules that are not contained in a dish.

Any ideas about the source of the "babbling" effect on the far left 
and right towards the end of this recording? Seems like it could be 
the sound/location itself but it might also be some sort of 
center-side mic interactions. I heard this effect in the recording 
made from your yard too. I'm having trouble imagining the geese on 
the far left and far right at the same time they are in the center at 
great distance.

I have noticed that Rapid mic capsules tend to have less high-end 
frequency response than some recordists prefer.  Boosting the 
high-end above 2K centered around 4.5K in conjunction with several 
very narrow bands of parametric noise/hiss attenuation 6-8K Hz seemed 
to improve the clarity of the natural sounds quite a bit.

Wouldn't be great to test four of Klas's EMKS-23's in a Multi-Capsule 
ParaJeck? I believe at least one of Klas' rigs uses/d multiple mics 
on a boundary array-- all within the dish. I'm sure there is 
something acoustically "wrong" about the rig concept,.. Comments 

Please feel free to work on rig name/subject-line of the thread some 
more, Tom. Your multiple capsule design was getting confused with 
John's design in the list archive.  I note that "para" is common to 
"parabolic," "parallel capsule wiring" and the two "parallel 
boundaries" of the divider. I'm not sure "Jecklin" is a perfectly 
accurate term as the capsules are not on the order of being 
head-spaced. Most Jecklin rigs I've seen also use a reflection 
dampening barrier-- whereas your rig does seem to have some boundary 
effect in play (with the front capsules).  I suppose one could also 
place front mics on head-spaced thin plates to acquire traits of 
Curt's rigs. Rob D.


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